jquery对Json的各种遍历方法总结(必看篇)

packJson = {"name":"caibaojian.com", "password":"111"}

packJson = [{"name":"caibaojian.com", "password":"111"}, {"name":"tony", "password":"111"}];

var jsonStr = '{"name":"caibaojian", "password":"1111"}';

var jsonObj = {"name":"caibaojian.com", "password":"1111"};

var jsonObj = eval('(' + jsonStr + ')');

var jsonStr = jsonObj.toJSONString();

<script type='text/javascript' src="/UploadFiles/2021-04-02/jquery.js">

each


<script type='text/javascript' src="/UploadFiles/2021-04-02/jquery.js">

inArray


<script type='text/javascript' src="/UploadFiles/2021-04-02/jquery.js">

map


<script type='text/javascript' src="/UploadFiles/2021-04-02/jquery.js">原生js遍历json对象

遍历json对象：
无规律：


<script>
var json = [{dd:'SB',AA:'东东',re1:123},{cccc:'dd',lk:'1qw'}];
for(var i=0,l=json.length;i<l;i++){
for(var key in json[i]){
alert(key+':'+json[i][key]);
}
}
</script>


有规律：


packJson = [

{"name":"nikita", "password":"1111"},

{"name":"tony", "password":"2222"}

];

for(var p in packJson){//遍历json数组时，这么写p为索引，0,1

  alert(packJson[p].name + " " + packJson[p].password);

}


也可以用这个：


for(var i = 0; i < packJson.length; i++){

  alert(packJson[i].name + " " + packJson[i].password);

}


遍历json对象


myJson = {"name":"caibaojian", "password":"1111"};

for(var p in myJson){//遍历json对象的每个key/value对,p为key

  alert(p + " " + myJson[p]);

}


有如下 json对象：




var obj ={"name":"冯娟","password":"123456","department":"技术部","sex":"女","old":30};
遍历方法：
for(var p in obj){
str = str+obj[p]+',';
return str;
}


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